well, most likely, his processing is in 24or 32 bit processing mode, either have him lower the processing resolution to 24 or 16 bit or (what id do) is open the file first in cdwave, split into 2 chunks, and simply put back together in wavelab, no samples missed
i leave minein 32-bit rpocessing and chopallof my 16/48/44.1k stuff into 2 wav files and process from there